제출 #535115

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
535115		terrasphere	케이크 (CEOI14_cake)	C++17	20 / 100	2090 ms	10652 KiB

cake

#include <bits/stdc++.h>

using namespace std;

long long N,Q,A;
int index1,index2;

long long arr[252525];

vector<long long> tree;

void init(int start,int end,int node)
{
    if(start==end)
    {
        tree[node]=arr[start];
        return;
    }
    init(start,(start+end)/2,node*2);
    init((start+end)/2+1,end,node*2+1);
    tree[node]=max(tree[node*2],tree[node*2+1]);
    return;
}

void update(int start,int end,int node,int index)
{
    if(index<start || end<index)
        return;
    if(start<=index && index<=end)
    {
        if(start==end)
        {
            tree[node]=arr[start];
            return;
        }
    }
    update(start,(start+end)/2,node*2,index);
    update((start+end)/2+1,end,node*2+1,index);
    tree[node]=max(tree[node*2],tree[node*2+1]);
    return;
}

long long maximum(int start,int end,int left,int right,int node)
{
    if(start>right || end<left)
        return 0;
    if(left<=start && end<=right)
        return tree[node];
    return max(maximum(start,(start+end)/2,left,right,node*2),maximum((start+end)/2+1,end,left,right,node*2+1));
}

void maximum_index1(int start,int end,int left,int right,int node,long long point)
{
    if(index1!=1e6)
        return;
    if(right<start || end<left)
        return;
    if(left<=start && end<=right)
    {
        if(tree[node]>point)
        {
            if(start==end)
            {
                index1=start;
                return;
            }
            maximum_index1(start,(start+end)/2,left,right,node*2,point);
            maximum_index1((start+end)/2+1,end,left,right,node*2+1,point);
        }
        else
            return;
    }
    maximum_index1(start,(start+end)/2,left,right,node*2,point);
    maximum_index1((start+end)/2+1,end,left,right,node*2+1,point);
    return;
}

void maximum_index2(int start,int end,int left,int right,int node,long long point)
{
    if(index2!=-1e6)
        return;
    if(right<start || end<left)
        return;
    if(left<=start && end<=right)
    {
        if(tree[node]>point)
        {
            if(start==end)
            {
                index2=start;
                return;
            }
            maximum_index2((start+end)/2+1,end,left,right,node*2+1,point);
            maximum_index2(start,(start+end)/2,left,right,node*2,point);
        }
        else
            return;
    }
    maximum_index2((start+end)/2+1,end,left,right,node*2+1,point);
    maximum_index2(start,(start+end)/2,left,right,node*2,point);
    return;
}

int main()
{
    scanf("%lld%lld",&N,&A);
    A--;
    tree.resize(4*N);
    for(int i=0;i<N;i++)
        scanf("%lld",&arr[i]);
    init(0,N-1,1);
    scanf("%lld",&Q);
    for(long long t=1;t<=Q;t++)
    {
        char type;
        scanf(" %c",&type);
        long long a,b;
        scanf("%lld",&a);
        a--;
        int answer;
        long long cur_max;
        if(type=='E')
        {
            scanf("%lld",&b);
            long long pre=arr[a];
            for(int i=0;i<N;i++)
            {
                if(arr[i]>pre && arr[i]<=N-b+1)
                {
                    arr[i]--;
                    update(0,N-1,1,i);
                }
            }
            arr[a]=N-b+1;
            update(0,N-1,1,a);
        }
        else
        {
            index1=1e6;
            index2=-1e6;
            if(A==0 || A==N-1)
                answer=abs(A-a);
            else if(A==a)
                answer=0;
            else if(A>a)
            {
                cur_max=maximum(0,N-1,a,A-1,1);
                maximum_index1(0,N-1,A+1,N-1,1,cur_max);
                index1=min((int)N,index1);
                answer=index1-a-1;
                //printf("%d %d %d %d\n",answer,a,A,index1);
            }
            else
            {
                cur_max=maximum(0,N-1,A+1,a,1);
                maximum_index2(0,N-1,0,A-1,1,cur_max);
                index2=max(-1,index2);
                answer=a-index2-1;
                //printf("%d %d %d %d\n",answer,index2,A,a);
            }
            printf("%d\n",answer);
        }
        //for(int i=0;i<N;i++)
        //    printf("%d %lld\n",i+1,arr[i]);
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

cake.cpp: In function 'int main()':
cake.cpp:106:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  106 |     scanf("%lld%lld",&N,&A);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
cake.cpp:110:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |         scanf("%lld",&arr[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~
cake.cpp:112:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  112 |     scanf("%lld",&Q);
      |     ~~~~~^~~~~~~~~~~
cake.cpp:116:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  116 |         scanf(" %c",&type);
      |         ~~~~~^~~~~~~~~~~~~
cake.cpp:118:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  118 |         scanf("%lld",&a);
      |         ~~~~~^~~~~~~~~~~
cake.cpp:124:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  124 |             scanf("%lld",&b);
      |             ~~~~~^~~~~~~~~~~

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• Subtask 3: 20 / 20
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